jcyuhn is correct, at least in my case. Original bolts ar M6-1x70mm. Ordered 2 M6-1x75 bolts and 3 6mm washers from boltdepot.com for $9.7, of which $7.55 was the cost to ship by UPS Ground. These snugged up nicely with just 2 washers. I had driven for a few weeks without the 2 bolts in place without a problem, so the 'fix' was unnecessary; but I pleased.
regards,
Mark